DE60031867T2 - Scalable process transmitter - Google Patents

Description

BACKGROUND THE INVENTION

The The present invention relates to industrial process control devices. In particular, the present invention relates to measured value transmitters, which are used to measure various parameters (process variables) in industrial processes are used.

Measured value transmitter are used in processing and manufacturing equipment for measuring, for example Pressure, temperature, flow, Density, viscosity and many other chemical, physical and electrical properties used by fluids. Transmitters are usually used on tanks, pipes and other fluid containers attached and transferred a signal representing a property of the fluid to a remote location such as a control room.

transmitter show for usually a sensor housing for one Sensor circuit arrangement and a transmitter housing for a transmitter circuit arrangement on. The two cases are at a fire or flameproof mechanical joint or a joint connected. For usually are the seals, the software and the electrical interfaces between the sensor circuitry and the transmitter circuitry not standardized, whereby it is not practical or suitable to use sensor and transmitter components of different product programs combine.

Usually is the interior of the sensor housing to the interior of the transmitter housing open to allow that wires pass through the screw connection. In a plant environment it is not practical to use a field wiring without using a Transmitter housing directly to the sensor housing to lay, because the sensor housing not sealed against the environment and fireproof is. Furthermore, the sensor circuit arrangement is not in the Able to over a big Transfer distance or to send.

Within a product program of print transmitters is the end user usually in capable of producing components for producing different combinations of pressure areas, wetted materials and electrical or display devices to combine. About that In addition, this connection or assembly is usually required by the manufacturer carried out become. In general, however, it is not practical for the user to Sensor and transmitter components from different product programs due to their electrical, software-related and mechanical lack of compatibility or incompatibility merge.

US 5,353,200 describes a process transmitter with an inner conductive cover for EMI shielding, and US 5,665,899 describes a process transmitter with pressure sensor diagnostics.

It There is a need for a transmitter arrangement in which the sensor section directly with a control system or with other neighboring components can be wired by using a local bus to increase the functionality and scalability is used. In addition, there is a need on transmitter components, which also with components from other product programs together can be without the need for significant modifications have been made by the end user.

SUMMARY THE INVENTION

The The present invention provides a sensor module, a transmitter module and method of manufacturing the sensor module and the transmitter module as stated in the claims 1, 19, 48 and 49 ready. The invention also provides a transmitter ready, which a transmitter module and a sensor module as explained in claim 36.

It a modular sensor module is provided which includes the following comprising: a sensor housing, which is designed so that it is the modular sensor module on a process opening supports, where the housing an outer wall surrounding a cavity and one with the outer wall integral or in one piece having formed connecting piece and is designed to be a scalable transmitter module supports, with the connecting piece to the cavity opens; a circuit in the cavity, wherein the circuit is a sensor which is attached to the process opening couples and provides a sensor output; and an implementation which the connector seals and has external conductors which energize the circuit and provide the sensor output, wherein the sensor output is for a local Configurable with a scalable transmitter module is and for a direct wiring with a remote receiver configurable is.

Of Furthermore, a transmitter is provided which is a scalable Transmitter module, which with a modular according to the invention Sensor module is coupled.

Furthermore a scalable transmitter module is provided which includes a casing which is designed to be modular Sensor module is attached, wherein the housing surrounding a cavity Exterior wall has and a first opening which is designed to be mounted on a connector of the modular Sensor module can be attached, as well as a second opening, which for connection to a cable duct to a remote receiver is designed, with the first and the second opening in the cavity as well the cavity has a removable or removable cover; and a circuit in the cavity, which is a plug connection or a plug which is designed such that he with an execution of the modular sensor module, the circuit is designed to receive a sensor output from the modular sensor module receives and generates a scalable output on circuit terminals, which are accessible by removing the cover, being the scalable Output designed for connection to the remote receiver is.

It a transmitter is provided which is a modular sensor module which is provided with a scalable transmitter module according to the present invention Invention is coupled.

Of Another is a method of making a scalable transmitter module provided comprising the following steps: formation a housing for mounting on a modular sensor module, the housing having a a cavity surrounding outer wall and a first opening which is designed so that it fits on a connector of the modular Sensor module can be attached, as well as a second opening, which for connection to a cable duct to a remote receiver is designed, and providing openings through the first and second opening in the cavity as well as covering the cavity with a removable Cover; and installing a circuit in the cavity, wherein the circuit has a plug designed in such a way is that he is having an implementation of the modular sensor module, the circuit for the Reception of a sensor output signal is designed by the modular sensor module and a scalable output on circuit connections generated, which are accessible by removing the cover, wherein the scalable output for connection to the remote receiver is designed.

Furthermore is a method of making a modular sensor module provided comprising the steps of: providing a housing, which is designed to accommodate the modular sensor module a process opening supports, Providing an exterior wall for the Casing, which surrounds a cavity, and providing a fitting for the housing, which is designed such that it is a scalable transmitter module supports, and opening the fitting towards the cavity; Installation of a circuit in the cavity, wherein the circuit has a sensor that couples to the process vessel and providing a sensor output; and sealing a passage in the connection piece as well as providing external conductors on the with the sensor output signal connected implementation, and adaptation of the ladder for both a local connection to a scalable transmitter module as well as direct wiring to a remote receiver.

embodiments provide a modular sensor module comprising: a Housing device or a housing device, which is such is designed to support the modular sensor module on a process opening, wherein the housing device an outer wall having a cavity surrounding, and a connecting piece, which is designed such that it is a scalable transmitter module supports, with the fitting opens towards the cavity; a measuring device having a circuit in the cavity, wherein the circuit has a sensor coupled to the process vessel and providing a sensor output; and a connection or connection device, which one implementation, the connecting piece seals, and with the Sensoraus gear connected external conductor, which both for a local connection to a scalable transmitter module as well for one direct wiring with a remote receiver customizable are.

Embodiments provide a scalable transmitter module having a housing device configured to be mounted on a modular sensor module, the housing device having an outer wall surrounding a cavity and a first opening configured to rest on a housing A connector of the modular sensor module can be attached, and a second opening, which is designed for connection to a cable channel to a remote receiver, and openings through the first and second openings in the cavity and a removable cover which covers the cavity; and a measurement device in the cavity that includes a circuit with a plug configured to mate with a feedthrough of the modular sensor module, the circuit configured to receive a sensor output signal from the modular sensor and generates a scalable output on circuit terminals accessible by removing the cover, the scalable output being adapted for connection to the remote receiver.

embodiments provide a modular sensor module, which in many ways seen directly with a control system or other neighboring Components can be wired. An optical scalable transmitter module can provide increased functionality and scalability for different Couple applications to the sensor module. The sensor module closes one Sensor output, which can be configured so that it to Formation of a transmitter locally to the scalable transmitter module couples, or that it is wired directly to a remote receiver can be. A housing for the Modular sensor module supports the circuit arrangement in a cavity and a sensor that can measure a process variable. A passage seals a connector of the housing which provides an external connection to the sensor module.

Further Details, features and advantages will be apparent from the following Brief description of the invention with reference to the drawings.

SUMMARY THE DRAWINGS

It demonstrate:

1 a modular sensor module according to an aspect of the invention coupled to a process pipeline;

2 two modular sensor modules coupled to a transmitter module on a local bus;

3A . 3B . 3C and 3D examples of modular sensor modules, printed circuit boards, terminal blocks or housing for transmitter modules;

3E various combinations for sensor module boards, housings and terminals or plugs;

4 a simplified block diagram of a modular sensor module according to an embodiment;

5 a simplified block diagram of a transmitter module according to an embodiment;

6 a simplified diagram of an embodiment of a modular sensor module;

7 a cross-sectional view of an embodiment of a modular differential pressure transducer, which includes a transmitter module and a sensor module;

8A . 8B and 8C enlarged front, plan and sectional views of an embodiment of a connector on the modular sensor module of 7 ;

9A and 9B Embodiments of differential and pressure gauge or absolute pressure transmitters;

10 a simplified diagram of an embodiment of a scalable transmitter module;

11A . 11B . 11C and 11D Front and side views of embodiments of single or dual-bay packages for scalable transmitter modules;

12 an exploded view of a scalable transmitter module with two compartments; and

13A and 13B Floor plan and sectional views of an embodiment of a connector for a scalable transmitter module.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention provides a new sensor and transmitter module architecture for use in industrial processes. This new architecture is modular and highly scalable and, unlike typical prior art designs, can be used in a wide variety of configurations. In the present invention, a modular sensor module (or "supermodule") may be used alone to detect and measure process variables, or it may be used in combination with a "feature board" housed in the optional transmitter module. The feature board may be used to add more advanced features to the supermodule, as desired for a particular application, or as the requirements for a particular application change over time. This modularity and scalability reduces manufacturing costs and reduces inventory requirements. Furthermore, these properties provide more configuration options or choices for a user and also reduce the number of different specific transs mitter configurations that must be purchased by a user. The sensor module and the transmitter module preferably satisfy intrinsic safety standards while still maintaining the ability to scale without removing the module or modules from the "field or work area".

1 is a simplified diagram, which is a modular sensor module 10 shows that to an industrial process 12 (shown as a process tube), which may include a process "fluid" such as a liquid or a gas. The modular sensor module 10 connects to the process 12 via a branch pipe or branched pipeline 14 and is configured to measure a process variable of the process. Examples of process variables include pressure, temperature, flow, level, pH, conductivity, turbidity, density, concentration, chemical composition, or other characteristics of the process fluid. The modular sensor module 10 may include one or more process variable sensors and has an output connection or fitting 22 which may be configured to communicate in accordance with more than one communication standard.

In the in 1 In the embodiment shown, the output of the sensor couples 10 to a two-wire process control loop 16 which match known standard two-wire control loops such as a 4-20 mA loop, a HART protocol loop, loops that operate in accordance with Fieldbus, Profibus or other protocols, and so on. The bow 16 connects to a remote location such as a control room 18 , The control room 18 includes a power supply (not shown) so that the module 10 completely from the same loop 16 through which it communicates, can be operated. In general, the sensor module has 10 a single main exterior housing 20 with a process connection designed to be connected to a process 12 and a parent compound or fitting 22 which are configured to provide more than one different type of output for coupling to different types of devices or data buses.

2 shows another example configuration of the architecture of the present invention. In 2 couple two modular sensor modules 10 to a local bus 26 which communicates with a scalable transmitter module 28 which includes a "feature board". Usually it is the bus 26 around a serial bus, for example according to the Controller Area Network (CAN) protocol. The transmitter module 28 may require additional editing based on measurements from the two sensor modules 10 or otherwise communication via a process control loop 16 provide. For example, the sensor module 10 be configured to provide redundant measurements, or it may be configured to provide a plurality of measurements such that the transmitter module 28 can calculate more advanced process parameters such as flow rate or liquid level. In the specific configuration, the two sensor modules are shown to provide a differential pressure on orifices or orifice plates 30 measure up. The sensor modules 10 however, they can measure any kind of process variable. In another example, that in 7 is shown is the sensor module 10 attached directly to the transmitter module, which in turn can couple itself to alternative sensor modules.

The configuration of the modular sensor module 10 and the Trans mittermoduls 28 which in the 1 and 2 provides a highly scalable architecture. A user can have a single sensor module 10 for simple installations where a process variable is measured. However, for more advanced configurations, a transmitter module can be used 28 be added to provide more advanced or improved capabilities (ie "features"). For example, the module 28 perform more advanced or improved diagnostics or data on other configurations for transmission on any type of control loop or data bus 16 convert. The transmitter module 28 can collect data from a plurality of sources for redundancy or to provide more advanced process variables, such as the flow rate, which can be calculated using or using a number of different process variables. Another example is the liquid level from which process variables are collected at multiple locations on a process tank or container. The transmitter module 28 can also have a visuale output 32 such as an LCD in which data or process variables are visually provided and can be accurately examined by an operator.

In one configuration, the bus provides 26 In addition, energy to the modules 10 , In some embodiments, the transmitter module becomes 28 even from a loop 16 operated, so no additional energy connections for the transmitter 28 and the modules 10 required are. The bus 26 can also be used for easy on / off communication or regulation. In embodiments in which the transmitter module 28 directly to a sensor module 10 is coupled, becomes a bus 26 to provide ei its internal data bus used.

Preferably, the module is 10 Configured to intrinsic safety standards so that it can be used in hazardous explosive environments. For a simple configuration of a transmitter module 28 it is a configuration in which the module 28 in a simple way, an end or end compartment to accommodate a terminal block (see 3C ) for a wiring of the loop 16 and the bus 26 provides. For more advanced configurations, the transmitter module can 28 include a plurality of shelves for housing wiring end or termination blocks and circuit boards. A certain functionality of the transmitter module 28 is provided in software for the module 28 selected and / or loaded based on a particular application. This reduces the number of different hardware variants that must be provided, and different configurations can be obtained simply by selecting the appropriate software and entering the module 28 is loaded.

The 3A - 3D show various modules that can be used in the scalable architecture of the present invention. For example, shows 3A modular sensor modules 10A and 10B , A suitable sensor module may be selected based on a particular implementation. For example, the sensor module should be selected to be configured for the appropriate process connections, process variable measurements, process variable ranges, material selection, and so on. 3B illustrates exemplary printed circuit board (ie feature board) variants 36A and 36B , The circuit boards 36A and 36B are usually part of the transducer module 28 , For example, the alternative circuit board 36A provide a visual indication or the alternative circuit board 36B can provide a special data output format or process variable compensation. 3C illustrates terminal block variants 38A and 38B , The connection blocks 38A and 38B For example, they may provide a different number of terminations, different types of transient protection, hardware switches, etc., as desired for a particular application. Usually are terminal blocks 38A and 38B Part of the transmitter module 28 , 3D shows housing variants 40A and 40B for the transmitter module 28 which can be selected for a specific implementation. For example, the housing variants 40A and 40B based on requirements for housings having one or two shelves, various different case materials as needed, different diameters or sizes as needed, etc. The housing 40A and 40B make the case for the transmitter module 28 ready.

3E also illustrates the scalability of the invention. The sensor modules 10A and 10B can with different combinations of alternative circuit boards 36A and housings 40A and 40B be used. Quick connector or connections 41A . 41B and 41C can be used for direct coupling to the modules 10A and 10B be used. This scalability allows a user to add features or modify configurations as desired.

In addition to those discussed above Benefits possible the scalability of the invention the use of a common Feature board in a family of sensor modules. Each sensor module in the family can provide different levels of performance for different Be constructed types of process fluids or environments, and / or provide various hardware / software capabilities. New Feature boards can to be added to existing sensor modules to new skills such as a new communication protocol or a new one Provide diagnostic function. As another example, a new feature board with maybe new skills added Become to having a variety of sensor modules in a unique Architecture to work or work.

4 is a simplified block diagram showing components of a modular sensor module 10 according to a specific embodiment. The module 10 typically includes one type of sensor device, such as one or more pressure sensors 42 on. The measuring circuit arrangement 46 delivers based on a measurement of the pressure sensor 42 a measurement signal to a microprocessor 48 , wherein the measurement signal based on the with the aid of a temperature sensor 44 measured temperature is compensated. The microprocessor 48 connects to the local bus 26 , which is shown here as a serial data bus. The microprocessor 48 operates according to instructions or instructions stored in a non-volatile memory such as an EEPROM 50 which may also be a read-only memory (ROM). Zero point range and / or safety switches are provided around the zero point and the measuring range of the module 10 to configure. The switches may be open / closed switches connected to an in 1 shown fitting 22 couple. The microprocessor 48 also provides an output to a MODAC 52 , which can then be used when a module 10 to transfer data to ei ner two-wire process control loop 16 is configured. (MODAC refers to an application specific integrated circuit ASIC having a modem and a digital-to-analog converter, of course other configurations may be used with the invention.) The circuit arrangement may be configured to control the current through the loop 16 regulates by taking a shunt regulator 54 used or that they are data digitally on the loop 16 transfers. A voltage regulator 56 connects to the loop 16 or to the transmitter module 28 and is used to provide a regulated voltage to circuits within a unit 10 used. The MODAC 52 also has an optional up / down scale input, which is used to scale the output signal. A clock 58 regulates the operation of the MODAC 52 and for example the microprocessor 48 , In the in 4 In the embodiment shown, a total of five input / output ports is provided, and the embodiment may be configured for different types of communication protocols. However, any number of input / output ports can be used.

5 is a simplified block diagram of a transmitter module 28 , A microprocessor 60 in the module 28 connects to a sensor module 10 via the input / output I / O 62 of the sensor module. The input / output I / O 62 of the sensor module provides a connection and an interface with some or all of them 4 ready shown connections. For example, in addition to providing a serial communication link over a bus 26 Energy to the sensor module 10 via the process loop connection 16 to be provided. The microprocessor 60 works according to in the store 64 stored instructions at a speed which from a clock 66 is determined. Data is sent via the process control loop 16 transmitted and received by a loop input / output circuit arrangement 68 is used. A voltage regulator 70 can as a power source for the circuit arrangement within the transmitter module 28 to be provided. This energy can be completely derived or branched off from energy passing through the loop 16 Will be received.

A store 64 may be programmed during manufacture or during subsequent use to provide various features and with different types of sensor modules 10 and sensors included in such modules operates. Usually the memory points 64 a non-volatile memory that can store programming commands and data permanently. Different features are required, or if the architecture and configuration change, the commands can be stored in memory 64 for a microprocessor 60 to be updated. The transmitter module 28 may be configured to be a fairly standardized platform for the microprocessor with different features implemented in the programming instructions 60 provides. Of course, there are also various alternative hardware such as a local display 72 or a special input / output circuit arrangement 68 to disposal. In one example, however, the I / O 68 be configured to operate according to a number of well-known standards such as a 4-20 mA standard, the HART communication protocol, the Fieldbus protocol, etc. The microprocessor 60 regulates I / O I / O 68 to make this the appropriate protocol as programmed in the memory 64 stored instructions used.

The 6 to 13 provide a more detailed description of some specific implementations of the architecture of the present invention.

6 shows a block diagram of an embodiment of a modular sensor module 100 , which is a specific implementation of module 10 in 1 is. The modular sensor module 100 has a housing 102 on which the modular sensor module 100 in a cavity 108 supports or stores and provides a process opening 104 ready for coupling to a process fluid. At the process opening 104 it can be a flange, a pipe, etc. The housing 102 has a connector 110 which is a scalable transmitter module such as the module 28 in 2 support or store. The connection piece 110 Can be integral with the outer wall 106 be formed or welded to the outer wall, so that no seals at the junction between the connector 110 and the outer wall 106 required are. The connection piece 110 has an opening 112 on that are in the cavity 108 extends.

A sensor module circuit 114 in the cavity 108 closes a sensor 116 one, the process opening 104 coupled. The circuit 114 For example, the in 4 provide shown components. The circuit 114 generates a sensor output signal 118 which represents or represents a process variable.

An implementation 120 in the opening 112 of the connector 110 seals the fitting 110 such that the cavity 108 flame or fire proof. The modular sensor module 100 is fully sealed and is suitable for use in the field of action or work area as a stand alone unit and does not require installation of a Transmitter module. The implementation 120 has external conductors 122 on which the circuit 114 excite the sensor output 118 deploy and receive configuration commands.

The sensor output 118 is for a local connection to the scalable transmitter module 28 ( 2 ) and is also for direct wiring to a remote receiver such as a control room 18 ( 1 ) configurable. At the exit 118 it can be more than just a connector. For example, a connection part or a group of connection parts may be provided for the remote connection. A digital configuration signal can be used to configure the sensor output to the circuit 114 be sent. In the specific embodiment shown, the output is 118 configurable to provide a signal that is transmittable over long distances to a remote receiver, such as a HART signal, a 4-20 mA analog signal, a Foundation Fieldbus signal, and the like. The exit 118 may be configured to send a local use signal, such as a CAN protocol signal, to a scalable transmitter module 28 or another local entity. This is schematically represented by a switch in the circuit 114 represented, which can be controlled by configuration commands, which for the microprocessor 48 be provided for selecting an output type.

7 shows a cross-sectional view of a sensor module 130 , which is directly connected to a scalable transmitter module 132 is attached. The module 132 is a specific implementation of the in 5 shown module 28 , In this example, the sensor module measures 130 a differential pressure (P1-P2) on a coplanar mounting flange 134 , The coplanar mounting flange is with a mating coplanar counter-inlet or to-run flange 136 with two process openings 104 screwed. An isolator 138 isolates or separates the process fluid from the sensor 116 , The isolator 138 closes a passage 140 one which the sensor 116 coupled to the process opening, the passage having a shape which provides fire protection. The isolator 138 also has a separation membrane 142 and is filled with a non-compressible fluid such as silicone oil. The isolator 144 is similar to the separator 138 ,

The connection piece 110 has an outer surface 146 for sealing against the transmitter module 132 on and a capillary tube 148 which is sealed for complete fire protection of the bushing. The capillary tube 148 is opened during manufacture and is used during production to check the quality of the seal of the cavity 108 and can also be used to empty or suck the cavity and fill it with a non-corrosive gas such as dry or hot air or a non-flammable gas such as dry nitrogen. After checking or filling the capillary tube 148 sealed or sealed by welding or glazing. The capillary tube 148 can also be used as a feed-through conductor or as a grounding conductor. The outer surface 146 of the connector 110 has a set screw surface 150 which allows a rotation of at least 360 degrees of a set screw. The connection piece 110 extends around the external conductors 122 and is notched to receive a plug from either a field wiring or a scalable transmitter module that mates with the external conductors. The housing is made of at least 2 mm thick or thick metal and is fire and explosion proof.

7 also shows a scalable transmitter module 132 which is a housing 160 for mounting on the sensor module 130 having. The housing has a cavity 164 surrounding outer wall 162 and has a first bearing surface 166 for attachment to the fitting 110 of the sensor module 130 on. The housing 160 also has a second support surface 168 for connection to a cable channel to a remote receiver. The bearing surfaces 166 . 168 open to the cavity and the cavity has a removable cover 170 on. Usually there are two bearing surfaces 168 on each side of the case 160 However, any number of bearing surfaces 168 can be used. The housing 160 may have two (or more) separate, separate or isolated cavities. The cover 170 is threaded to provide a fire-proof seal against the housing. A circuit 172 in the cavity 164 is with a plug 174 wired, which with the implementation 120 of the modular sensor module. The circuit 172 can receive a sensor output signal from the sensor module and a scalable output 178 on a circuit terminal block 176 generate, which by removing the cover 170 is accessible.

The connection piece 110 is more detailed in the 8A . 8B and 8C shown. The implementation 120 has a glass separator which projects slightly to its position in the fitting 110 to fix. The connection piece 110 is threaded as shown and has a groove for an O-ring seal.

9A shows a modular sensor module 180 for measuring the differential pressure with an associated scalable transmitter module 182 , 9B shows a modular sensor module 184 for measuring the absolute or gauge pressure. The sensor module 184 has a female threaded fitting for connection to a threaded pipe. The same scalable transmitter module 182 can be used as shown on a line of differential pressure transmitters and also on a line of pressure gauge or absolute pressure transmitters.

10 shows a simplified physical diagram of a scalable transmitter module 190 , In 10 used Zif remotely, which the in 7 used reference numerals denote similar features.

In the 11A - 11D Both front and side views of packages for scalable transmitters are shown. Front and side views of a housing 192 with a tray are in the 11B respectively. 11A shown. Front and side views of a housing 194 with two subjects are in the 11D respectively. 11C shown. The scalable transmitter module can be scaled in terms of the number of bins in the housing by choosing whether the housing 194 for a special application through a partition 195 is disconnected or whether a housing 192 to the housing 194 will be added.

12 is a view in disassembled parts of a housing 194 with two compartments, where the cover has been removed. The cavity to the housing between the first and second bearing surfaces, as well as the terminal block are in the partition wall 195 attached and sealed. The housing 194 can be further scaled by a terminal block, for example a simple block 196 with two connections or a connection block 198 is selected with more than two terminals depending on the application. The selected terminal block fits into the opening 200 between the two subjects and seals them off.

The 13A and 13B show the plug 174 in greater detail. The plug 174 has a plurality of ladders 210 of which three are shown. The plug 174 has spring-loaded projections 212 on which is in a groove on the fitting 110 snap in to the plug 174 in the fitting 110 to fix. A shrink tubing 214 can over the ladders 210 can be shrunk and shrunk to form a cable and provide improved abrasion or wear resistance.

The Architecture of the invention provides a sealed modular sensor module ready for delivery of a wired directly to a control system Basic output signal can be configured. If more specialized Types of transmitter outputs or visual displays or displays are desired, the modular Sensor module configured to provide a local output which supports a scalable transmitter module. One scalable transmitter module can be in the field of action or workspace added and have a circuit arrangement that is scaled, to meet the requirements of the application.

In an embodiment be a fire-proof joint, a gasket and electrical Compounds all combined in a single head, integral with the housing is formed of the modular sensor module. The head is standardized, to connect directly to a control system or attachment to enable a scalable transmitter module on the head. electric, mechanical and software interfaces are standardized at the head to to enable the same group of scalable transmitter modules at different Product programs modular sensor modules can be used.

Even though the present invention with reference to preferred embodiments will be appreciated by those skilled in the art, that changes in terms of shape and detail can be made without from the scope of the invention, which only by the formulation the appended claims limited is to deviate. It can other physical or electrical architectures are used to achieve the scalability of the present invention. The Sensor module may include any type of sensor which based on any type of measurement technology for measurement a process variable is used, such as print, Flow, temperature or level sensors. Preferably fulfill all couplings to the modules and the modules themselves intrinsic safety requirements, while her modularity preserve.

Claims (49)

Sensor module ( 100 ) comprising: a housing ( 102 ) which is configured to allow the mounting of the sensor module ( 100 ) at a process opening ( 104 ), whereby the housing ( 102 ) a cavity ( 108 ) surrounding outer wall ( 106 ) and one with the outer wall ( 106 ) integrally or integrally formed fitting ( 110 ), wherein the connector is adapted to be able to connect a transmitter module ( 28 ), wherein the fitting opens to the cavity; a circuit ( 114 ) in the cavity ( 108 ), where the circuit ( 114 ) has a sensor which is connected to the process opening ( 104 ) and provides an output signal; and an implementation ( 120 ), which the connection piece ( 110 ) and external conductors ( 122 ) having the circuit ( 114 ) and form a sensor output that is ready to deliver the output signal; characterized in that the circuit ( 114 ) is operable to provide the output signal in a first format suitable for transmission over a local link to a transmitter module ( 28 ) and to provide the output signal with a second format suitable for transmission via direct wiring to a remote receiver ( 18 ) suitable is. Sensor module ( 100 ) according to claim 1, which further comprises a separating member ( 138 ), for the separation of a fluid at the process opening ( 104 ) from the sensor ( 116 ) is configured. Sensor module ( 100 ) according to claim 2, characterized in that the separating member ( 138 ) a passage ( 140 ) for coupling between the sensor ( 116 ) and the process opening ( 104 ), wherein the passage has a constriction, whereby flame protection is provided. Sensor module ( 100 ) according to one of claims 1 to 3, characterized in that the connecting piece ( 110 ) an outer surface ( 146 ) for sealing against a transmitter module ( 28 ) is designed. Sensor module ( 100 ) according to one of claims 1 to 4, characterized in that the implementation ( 120 ) a capillary tube ( 148 ) to complete the flameproofing of the bushing ( 120 ) is sealed. Sensor module ( 100 ) according to one of claims 1 to 5, characterized in that the cavity ( 108 ) is filled with a non-flammable gas. Sensor module ( 100 ) according to one of claims 1 to 6, characterized in that the outer surface ( 146 ) of the connector ( 110 ) beyond a set screw ( 150 ) which is adapted to prevent rotation of the set screw by at least 360 ° on the transmitter module (10). 28 ) allowed. Sensor module ( 100 ) according to one of claims 1 to 7, characterized in that the connecting piece ( 110 ) around the external conductors ( 122 ) and is designed so that it has a plug ( 174 ), which is connected to the external conductors ( 122 ) matches. Sensor module ( 100 ) according to one of claims 1 to 8, characterized in that the housing ( 102 ) is made of metal and has a wall thickness of at least 2 millimeters and that the housing is explosion proof. Sensor module ( 100 ) according to one of claims 1 to 9, characterized in that the housing ( 102 ) a flange ( 134 ) connected to the process opening ( 104 ) and also to a second process opening ( 104 ) couples to measure the differential pressure. Sensor module ( 100 ) according to one of claims 1 to 10, characterized in that the sensor output a local connection with a transmitter module ( 28 ) via a serial bus. Sensor module ( 100 ) according to one of claims 1 to 11, characterized in that the sensor output a local connection with a transmitter module ( 28 ), the local connection having between three and five conductors. Sensor module ( 100 ) according to one of claims 1 to 12, characterized in that the sensor output a local connection with a transmitter module ( 28 ), and the circuit is configured to operate from the local terminal. Sensor module ( 100 ) according to one of claims 1 to 13, characterized in that the sensor output enables direct wiring to a remote receiver via a two-wire process control loop. Sensor module ( 100 ) according to claim 14, characterized in that the process control loop is formed according to a 4-20 mA standard. Sensor module ( 100 ) according to claim 14, characterized in that the process control loop is formed according to a digital communication standard. Sensor module ( 100 ) according to one of claims 1 to 16, characterized in that the module is intrinsically safe. Transmitter, which has a sensor module ( 100 ) according to one of claims 1 to 17. Transmitter module ( 28 . 132 ) comprising: a housing ( 160 ), which can be mounted on a sensor module ( 130 ), wherein the hous se 160 ) a cavity ( 164 ) surrounding outer wall ( 162 ), and a first opening ( 166 ), which is designed such that it is mounted on a connecting piece ( 110 ) of the sensor module ( 130 ) is attachable, and a second opening ( 168 ) adapted to be connected to a cable channel to a remote receiver, the first and second openings facing the cavity and the cavity (FIG. 164 ) a removable cover ( 170 ), and wherein the housing is characterized by: a circuit ( 172 ) in the cavity with a plug ( 174 ), which is designed in such a way that it 120 ) of the sensor module, the circuit ( 172 ) is designed such that it receives an output signal from a sensor output of the sensor module and an output signal ( 178 ) on circuit connections ( 176 ), which by removing the cover ( 170 ), the circuit terminals being adapted for connection to a remote receiver. Transmitter module ( 28 ) according to claim 19, characterized in that the circuit comprises a terminal block, which is designed for the connection of the sensor output to a remote receiver. Transmitter module ( 28 ) according to claim 19 or 20, characterized in that the circuit is configured to transmit the output signal on a two-wire process control loop adapted for transmission to a remote receiver. Transmitter module ( 28 ) according to one of claims 19 to 21, characterized in that the removable cover includes a window, and that the circuit has a visible through the window display. Transmitter module ( 28 ) according to one of claims 19 to 22, characterized in that the cavity is divided by a partition wall, which is connected between the first and second openings with the housing, and that the terminal block is sealingly fixed in the partition wall. Transmitter module ( 28 ) according to one of claims 19 to 23, characterized in that the circuit is configured to process an output signal from a sensor module. Transmitter module ( 28 ) according to one of claims 19 to 24, characterized in that the circuit is configured for coupling to two sensor modules. Transmitter module ( 28 ) according to any one of claims 19 to 25, characterized in that the transmitter module is configured to be spaced from a sensor module and configured to allow electrical assembly of the units. Transmitter module ( 28 ) according to claim 21 or any one of claims 22 to 26 as claims dependent on claim 21, characterized in that the transmitter module is configured to be physically connected to the feedthrough of a sensor module. Transmitter module ( 28 ) according to claim 21 or any one of claims 22 to 27 as claims dependent on claim 21, characterized in that the transmitter module is configured to transmit the output signal on a two-wire process control loop according to a 4-20 mA standard. Transmitter module ( 28 ) according to claim 21 or any one of claims 22 to 28 as claims dependent on claim 21, characterized in that the transmitter module is configured to transmit the output signal on a two-wire process control loop according to a digital standard. Transmitter module ( 28 ) according to claim 21 or any one of claims 22 to 29 as claims dependent on claim 21, characterized in that the transmitter module is configured to allow complete driving of the transmitter module and the sensor module via the two-wire process control loop. Transmitter module ( 28 ) according to one of claims 19 to 30, characterized in that the circuit is designed for the complete drive of a sensor module with current through the bushing. Transmitter module ( 28 ) according to any one of claims 19 to 31, comprising a serial bus configured to receive the output signal from the sensor output of the sensor module. Transmitter module ( 28 ) according to one of claims 19 to 32, characterized in that the plug has between three and five conductors. Transmitter module ( 28 ) according to one of claims 19 to 33, characterized in that the circuit is configured to drive the sensor module. Transmitter comprising the transmitter module according to any one of claims 19 to 34, the a sensor module is connected. Transmitter, which has a transmitter module ( 28 ) according to any one of claims 19 to 34 connected to the sensor module ( 100 ) is connected according to one of claims 1 to 17. A transmitter according to claim 36, which is a feature panel which is responsible for processing the sensor output from the circuit of the sensor module is configured. Transmitter according to one of claims 36 or 37, which is a second sensor module connected to the transmitter module is. Transmitter according to one of Claims 36 to 38, characterized that the transmitter module is spaced from the sensor module is, and that the units are electrically connected. Transmitter according to one of Claims 36 to 39, characterized that the transmitter module physically with the implementation of the Sensor module is connected. Transmitter according to claim 37 or any one of claims 38 to 40 as being dependent on claim 37 Claims, characterized in that the feature switchboard is an indicator having. Transmitter according to claim 37 or any one of claims 38 to 41 as being related to claim 37 Claims, characterized in that the feature panel for providing one with the sensor output on a two-wire process control loop associated output signal is configured. Transmitter according to Claim 42, characterized the two-wire process control loop is configured according to a 4-20 mA standard. Transmitter according to Claim 42, characterized that the two-wire process control loop according to a digital standard is configured. Transmitter according to one of Claims 42 to 44, characterized that the transmitter module and the sensor module completely over the two-wire process control loop operate. Transmitter according to one of Claims 36 to 45, characterized that the sensor module completely is powered by the modular transmitter module via the Received execution becomes. Transmitter according to one of Claims 36 to 46, characterized that the transmitter is intrinsically safe. Method of manufacturing a transmitter module, the method comprising the following steps: manufacturing a housing for mounting on a sensor module, the housing having a a cavity surrounding outer wall has and a first opening which is designed to be mounted on a connector of the sensor module is fastened, and a second opening, designed in such a way is that it is connectable to a cable channel to a remote receiver, and for providing openings through the first and second openings in the cavity, as well as cover the cavity with the help of a removable Cover; and wherein the method is further characterized by: installation a circuit in the cavity, wherein the circuit a Plug which is designed so that it with a passage of the sensor module mated, wherein the circuit is designed so that it Output signal from a sensor output of the sensor module receives and generates an output on circuit terminals, which by Removing the cover accessible are, wherein the circuit connections for connection to a remote receiver are designed. Method for producing a sensor module, wherein the method comprises the following steps: Provide a housing, which is configured such that it attaches the sensor module at a process opening allows Providing an outer wall surrounding the cavity for the housing and providing a fitting for the Casing, which is designed to support a transmitter module, as well as opening of the connector towards the cavity; Sealing a passage in the fitting and providing from external conductors on the implementation to provide a sensor output: and the method being characterized by: To install a circuit in the cavity, wherein the circuit a Sensor which is connected to the process container and ready is to send an output signal to the sensor output in a first To deliver format for transmission over a local connection to a transmitter module is suitable, and in one second format for transmission over a Direct wiring to a remote receiver is suitable.